Liquid spraying device



Feb. 2, 1932. c, NELSON 1,843,579

LIQUID SPRAYING DEVICE Filed Dec. 17, 1929 IN TOR (51m 'ATTORNEY Patented Feb. 2, 1932 UNITED STATES PATENT oFFic-s FRANKLIN c. NELSON, or ROSELLE PARK, NEW JERSEY, nssrenon To STANDARD 01L DEVELOPMENT COMPANY, A CORPORATION OF DELAWARE LIQUID SPRAYIN 'G DEVICE Application filed December 17, 1929; Serial No. 414,620. 7

This invention relates to improvements in liquid spraying devices of the type in which liquid is drawn from a source of supply and atomized by a blast of air or other gas passing over the opening of a suction or siphon tube.

Under some conditions of operation a portion of the atomized liquid may condense and run down the tube. Drip cups have'been provided to catch this liquid but this is only a partial solution of the problem since the liquid may escape from the drip cup and foul the sprayer, even when a run-back to the sprayer tank is provided. By the present invention I provide for atomizing any liquid that may collect in the drip cup.

The invention will be fully understood from the following description, read in connection with the accompanying drawings, in which Fig. 1 is a front elevation of a sprayer having a multiple discharge siphon tube and a drip-atomizer Fig. 2 is a similar view showing a sprayer having a single siphon tube;

Fig. 3 is an enlarged perspective view of the siphon tube and associated parts shown in Fig. 1; and

Fig. 4 is a side elevation of the device shown in Figs. 1 and 3.

Referring first to the last mentioned figures, reference numeral 1 denotes a tank or container forthe liquid to be sprayed. A barrel 2 is secured to the tank and is provided with the usual pump plunger 3 which carries a suction disc and related parts not shown) in the usual manner.

The multiple siphon tube 4 is preferably formed in the manner described in my pending United States application, Ser. No. 385,-

4. 540, filed August 13, 1929. In brief, the siphon tube is formed of a narrow sleeve of metal which is compressed at its upper end to form a plurality of tubes 5. The lower end of the sleeve is immersed in the liquid in tank 1 and the upper end terminates just below a number of orifices 6 which are in communication with the barrel 2. A drip cup 7 is Y secured to the end of the barrel under the ends of the tubes 5 and is arranged to catch any liquid that may run down' these tubes or be condensed near them. I

In accordance with the'present invention, I

provide a separate atomizing tube 8 which is arranged with its upper end in line with a perforation 9 opening into the barrel 2. The

lower end of tube 8 is-open and'arra'nged near the lowest point of thedrip cup 7. I

prefer to secure the drip cup to the end of the barrel by solder or the like andto provide indentations lOwhich receive the tubes 5 so that the drip cup may fit tightly against the barrel However, any other suitable attachment maybe used. The tube 8 is best formed in tegral wlth or secured to the compressed end of sleeve 4 but it may be supported in any other suitable way.

In theoperation ofthe device, air or gas compressed by the pump is forced through the orifices 6 and draws up and atomizes liquid from the tank 1 in the usual manner. At the same time the air or gas passes through perforation 9 and draws up and atomizes any liquid which'may tend to accumulate in drip cup 7.

In this way accumulation of liquid in the cup is avoided.

In the form of the invention shown in Fig. 2, the principle is the same but I provide only a single siphon tube 11. An auxiliary atomizing tube 12 has its lower open end near the bottom of the drip cup 7a andv operates as described above to remove liquid from that cup.

It will be understood that the particular arrangement of siphon tubes from the main body of the tank and auxiliary atomizing tubes effective to remove liquid from the invention as broadly as the prior art permits.

I claim:

1. In combination a siphon tube of a sprayer, a drip cup arranged to receive only liquid collecting about the siphon tube, an atomizing 'tube having its lower end adjacent the bottom of and Within the drip cup, and means for expelling the liquid through the atomizing tube.

2. In combination a siphon tube of a sprayer, a drip cup arranged to receive only liquid collecting about the siphon tube, an atomizing tube arranged adjacent to the siphon tube and having its lower end adjacent the bottom of and Within the drip cup, and means for simultaneously at'omizing liquid through both tubes.

3. In combination a plurality of siphon tubes of a sprayer arranged in parallel on a supporting; structure, a drip cup arranged to receive only liquid collecting about the siphon tubes, an atomizing tube carried by the siphon tube structure and having its lower end adjacent the bottom of and Within the drip cup, and means for simultaneously atomiz-ing liquid thru the-tubes.

4. In a sprayer, a multiple siphon tube comprising a'flat sleeve of metal compressed terminally to form a plurality of tubes, a drip cup having indentations conforming to the curvature of the tubes and supported in contacting relation thereto, and an atomizing tube carried by the compressed portion of the sleeve and having its loWer end adjacent thebottom of and Within the drip cup.

FRANKLIN O. NELSON. 

